River terraces
A river terrace - remnant of a former floodplain - has been left at a higher level after rejuvenation of the river.
Where a river renews its downcutting- it sinks its new channel into the former flooodplianm leaving the old floodplain above the lovel of the present river.
There terraces are cut back as the new valley is widened by lateral erosion.
If renewed rejuvenation takes place- the process is repeated + a new pair of terraces is formed beneath the original ones.
The River Thames has created terraces in its lower course by several stages of rejuvenation.
Terraces = useful shelter from floods in a lower-course river valley + natural routeways for roads and railways.
The built-up areas of Oxford + London are mainly located along the terraces of the River Thames.
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